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1. WO2022008885 - IMPROVEMENTS IN OR RELATING TO AN OPTICAL SCANNER FOR DIRECTING ELECTROMAGNETIC RADIATION TO DIFFERENT LOCATIONS WITHIN A SCAN FIELD

Publication Number WO/2022/008885
Publication Date 13.01.2022
International Application No. PCT/GB2021/051698
International Filing Date 05.07.2021
IPC
B22F 10/20 2021.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
10Additive manufacturing of workpieces or articles from metallic powder
20Direct sintering or melting
B22F 10/30 2021.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
10Additive manufacturing of workpieces or articles from metallic powder
30Process control
B22F 12/00 2021.1
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
12Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
B29C 64/153 2017.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
64Additive manufacturing, i.e. manufacturing of three-dimensional objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
10Processes of additive manufacturing
141using only solid materials
153using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B29C 64/268 2017.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
64Additive manufacturing, i.e. manufacturing of three-dimensional objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
20Apparatus for additive manufacturing; Details thereof or accessories therefor
264Arrangements for irradiation
268using laser beams; using electron beams
B33Y 30/00 2015.1
BPERFORMING OPERATIONS; TRANSPORTING
33ADDITIVE MANUFACTURING TECHNOLOGY
YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
30Apparatus for additive manufacturing; Details thereof or accessories therefor
Applicants
  • RENISHAW PLC [GB]/[GB]
Inventors
  • MCMURTRY, David Roberts
  • DARDIS, John
Agents
  • MATTHEWS, Paul
  • DUNN, Paul, Edward
  • ROLFE, Edward, William
  • BREWER, Michael, Robert
  • PHILLIPS, Patrick, James
Priority Data
2010315.606.07.2020GB
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) IMPROVEMENTS IN OR RELATING TO AN OPTICAL SCANNER FOR DIRECTING ELECTROMAGNETIC RADIATION TO DIFFERENT LOCATIONS WITHIN A SCAN FIELD
(FR) AMÉLIORATIONS APPORTÉES OU ASSOCIÉES À UN DISPOSITIF DE BALAYAGE OPTIQUE POUR DIRIGER UN RAYONNEMENT ÉLECTROMAGNÉTIQUE VERS DIFFÉRENTS EMPLACEMENTS À L’INTÉRIEUR D’UN CHAMP DE BALAYAGE
Abstract
(EN) A method and apparatus for determining an alignment of an optical scanner (106a, 106c) for directing an electromagnetic beam to locations within a scan field. The method may comprise locating a reference element (113) within the scan field of the optical scanner (106a, 106c) and controlling the optical scanner (106a, 106c) to cause the electromagnetic beam to be directed to a plurality of different points in the scan field, including at least one point on the reference element (113). Reflected electromagnetic radiation is detected. The method may comprise determining when the electromagnetic beam is directed to a reference position in the scan field given by the reference element (113) from a comparison of an intensity of the detected electromagnetic radiation for the different points and determining a corresponding demand signal that causes the optical scanner (106a, 106c) to direct the electromagnetic beam to the reference position.
(FR) La présente invention concerne un procédé et un appareil pour déterminer un alignement d’un dispositif de balayage optique (106a, 106c) pour diriger un faisceau électromagnétique vers des emplacements à l’intérieur d’un champ de balayage. Le procédé peut comprendre la localisation d’un élément de référence (113) dans le champ de balayage du dispositif de balayage optique (106a, 106c) et commander le dispositif de balayage optique (106a, 106c) pour amener le faisceau électromagnétique à être dirigé vers une pluralité de points différents dans le champ de balayage, comprenant au moins un point sur l’élément de référence (113). Un rayonnement électromagnétique réfléchi est détecté. Le procédé peut comprendre la détermination du moment auquel le faisceau électromagnétique est dirigé vers une position de référence dans le champ de balayage donné par l’élément de référence (113) à partir d’une comparaison d’une intensité du rayonnement électromagnétique détecté pour les différents points et la détermination d’un signal de demande correspondant qui amène le dispositif de balayage optique (106a, 106c) à diriger le faisceau électromagnétique vers la position de référence.
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